This is the spinning trap mechanism from set 76945 Atrociraptor Dinosaur: Bike Chase.

If yours is broken or missing, here’s your replacement! It is fully functional and works perfectly.

Some small cosmetic specks are present on a few pieces. Marks are permanent and purely cosmetic.

A close-up photo has been added for clarity.

Surprisingly satisfying to spin — almost like a LEGO fidget spinner.